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106 Threads found on edaboard.com: Closed Loop Control
One of my old tricks was to use a delay loop to operate a pin to drive an RC servo. It is allways a bad idea, unless you're planning to do nothing else with your 40-pin 16F877 microcontroller than making this control. Even if you were working with a device without built-in PWM modules, you could do that without closed (...)
Trying to circumscribe the issue as a whole, it is something curious that the command for the first switching of the valves is done with a closed loop control by measuring the water level of the tank with a pressure sensor, but in order to revert the valves you're now making this in a ( locally ) open loop process just (...)
hello i am intersted in referrnce and books on building control systems ( closed loop PID , fuzzy , ....) for motors and such in industrial product , and i need some books to RE-UNDERSTAND the theory and practical implementation in "digital" microcontroller regards
Our Electronic control Unit (ECU) is based on Renesas RH850F1L Microcontroller. We basically have closed loop control system. Outputs of this ECU power DC Motors to move Third-Row Minivan Seats. ECU inputs are coming from DC Motor. This feedback signal is hall pulses indicating whether motor is (...)
You can also use it to drive existing HDL and get input driven from Matlab I havent used it for some years, but we used it in a closed loop control system. Having Matlab drive all the interfaces made the simulation hiddeously slow (it has probably improved in that time). To speed it up it was much easer to have matlab dump an entire array (...)
Select the proper control mode. VFD control mode choice greatly depends on the application. The three VFD control modes are volts-per-Hertz (V/Hz), sensorless vector (sometimes called open-loop vector), and closed-loop. closed loop has the best speed (...)
The cheap and dirty way for slew rate control is a series gate resistor on the final sink and source devices. That scheme has variabilities from Rg, Cdg and Vdd. If you want something super controlled you're probably talking a closed loop, quasi-integrator type feedback with a reference, and this is unlikely to support (...)
I tried ACS712 yesterday but it's performance is just too low for such an application in terms of noise and speed. Can't understand this statement. I know a lot of PWM inverters that are performing closed loop current control with Allegro current sensors and similar products from other vendors. Your question catalog seems to ask
Hello frnds..i am designing 1-phase PFC rectifier(a bridge rectifier+DC-DC converter)..I m doing closed loop control using SG3525...I am using 3 NTCs in series(60 ohm total,4A) for inrush current protection...I have given 5 v reference(pin-2,non-inverting input) in SG3525... Following are my specification Input voltage-100Vpeak Output (...)
Hi everyone , I am a post graduate student in power electronics.I am a newbie in simulink modelling. Will someone any type closed loop voltage or current control in smpc power electronics ( converters or inverters). Thanks and regards. Peter
Hi everyone :-), I am a post graduate student in power electronics.I am a newbie in simulink modelling. Will someone any type closed loop voltage or current control in smpc power electronics ( converters or inverters). Thanks and regards. Peter
Hi, I am designing an amplifier in inverting configuration with variable gain. But when switching the gain of by changing the value of the feedback resistor, the CL 3dB bandwidth also will change since the GBW is fixed. So how could I fixed the CL bandwidth?? acceptable variation will be +/- 20% over corners. Thank you in advance!
Hi, I'd like to build a 3-phase DC to AC inverter that can regulate its output around 230V and frequency 50Hz and can be connected to the grid. I'd like to hear from professional people what is the most powerful microcontroller that can be used ? I am using PIC micro and have been advised to use PIC18F2331 as it contains many PWM ch . What is your
If there is no need of a refined closed loop control such as PID for instance, but a simple On/Off, dead-time, shutdown, or even soft-start, although it is not my expertise area, I presume could even suffice, but recommend perform on simulator environment a validation test before select a device.
Well i have tested the above code in a buck converter.Below are my observations over approximately 10 trials observation-1 1) i am getting 15 v output as against 16 v which is desired but i am not getting any pulses from the mikro or the oscilloscope is nt showing. observation-2 1) when i am opening the loop i.e. the input voltage to the buck c
How to find a whether a given transfer funtion is open loop or closed loop transfer function.??
Open loop or close loop application? Is there a control IC used? If it's closed loop, there must have malfunction, and please firstly check the feedback point voltage.
Servo drive involves a closed loop position control, independent of motor type. Achievable precision is primarly a feature of the position sensor and feedback system. If long motor lifetime isn't an objective, brushed DC is the easiest way to achieve high torque and dynamic.
I have a 1.5Kw servo with its drive. The drive has RS232 port , but the Chinese maker says it is for config only. I need to vary the speed of this servo based on a feed back , closed loop control. As from the documentation the only way to vary the speed at run time is by changing the voltage applied to a pin. That pin can accept -10 to +10V (...)
I'm not regularly using SIMETRIX, but the closed loop circuit analysis converges in my test. The waveform shows a strange excursion near the end, it disappears with decreased feedback gain. Thus I assume, the POP analysis requirements are somehow violated. When I look at the inverting comparator input signal, there's much 100 kHz ripple, more than